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United States Patent | 5,211,982 |
Wellman | * May 18, 1993 |
Milling quality wheat is milled by first removing germ and outer bran layers amounting to approximately 8-10 % of the weight of the wheat in a pearling process. The pearled wheat is then milled in a conventional roller mill to produce flour or semolina. Unexpectedly high yields have been observed, and the process yields a milled product which is unusually high in aleurone cell wall fragments for a given ash content.
Inventors: | Wellman; Warner (Omaha, NE) |
Assignee: | ConAgra, Inc. (Omaha, NE) |
[*] Notice: | The portion of the term of this patent subsequent to March 16, 2010 has been disclaimed. |
Appl. No.: | 736774 |
Filed: | July 29, 1991 |
Current U.S. Class: | 426/622; 426/483; 426/484 |
Intern'l Class: | A23L 001/10 |
Field of Search: | 426/622,483,484 |
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Article "Debranning Process is New Approach to Wheat Milling" World Grain, Jul./Aug. 1990, pp. 28-32. Translation of article from Getreide Mehl und Brot, Jun. 1983, pp. 185-189, "Investigations on the Behavior of the Microflora of Duram Wheat During Scouring", by G. Spicher and H. Zwingelberg. REMO, Rice Whitener Machine VERTIJET VJ III-Instructions Manual. REMO Mexico, VERTIJET VJIII, Grain Sheller and Polisher Brochure. Detection and Localization of Phenolic Compounds in Cereal Grains Using Computerized Microspectrophotometry Fulcher et al. Determination of Ferulic Acid in Grain by HPLC an Microspectroflurometry-Wetzel et al., G. Charalambous, Frontiers of Flavor, Proceedings of the 5th Internation Flavor Converence, Porto Karras, Chalkidiki, Greece, 1-3 Jul. 1987, 1988 Elsevier Science Publishers B.V. Amsterdam, printed in The Netherlands, pp. 409-429. Fluorescence Detection and Measurement of Ferulic Acid in Wheat Milling Fractions by Microscopy and HPLC-Pussayanawin et al. J. Agric Food Chem. 1988, 36, 515-520, 1988 American Chemical Society. The Botanical Constituents of Wheat and Wheat Milling Fractions by Autofluorescence-Jensen et al., American Association of Cereal Chemists, vol. 59, No. 6, 1982, pp. 477-484. Inside Cereals--a Fluorescence Microchemical View-Fulcher et al. Ottawa Research Station Agriculture Canada, Ottawa, Ontario Canada. A Technique to Improve Functionality of Flour from Sprouted Wheat Liu et al. (Including Abstract), Cereal Foods World, Jul. 1986, vol. 31, No. 7, pp. 471-476. The Influence of Wheat Endosperm on Flour Color Grade-Barnes, Journal of Cereal Science 4 (1986) 143-154. Differentiation of Wheat Based on Fluoroescence, Hardness and Protein-Irving et al., Cereal Chemistry, vol. 66, No. 6, 1989, pp. 471-476. Analysis of Botanical Compounds in Cereals and Cereal Products a New Way of Understanding Cereal Processing-Munch et al., Calsberg Research Laboratory, Copenhagen, pp. 27-40. Isolation of Gluten and Starch from Ground, Pearled Wheat Compared to Flour.Q. Zhuge et al., Department of Grain Science and Industry Shellenberger Hall, Kansas State University, Manhattan, Kan. (Abstract). Effect of Scouring on Microflora of Durum Wheat-Spicher, Journal article, 1983, pp. 185-189. |
TABLE I ______________________________________ Preferred Dimensions as Shown in Figures 4A-4H Preferred Dimension Reference Symbol (Inches) ______________________________________ A 23/8 B 113/4 C 1 D 13/4 E 41/8 F 41/8 G 3/8 H 31/4 I 0.050 J 1 5/16 K 3/4 L 131/4 M 2 13/16 N 75/8 ______________________________________
TABLE II ______________________________________ Weight Percentage Passing Through Selected Roll Selected Sieve Sieve ______________________________________ 1st Break 45% 18 W 2nd Break Cr 54% 18 W 2nd Break Fn 58% 28 W 3rd Break Cr 48% 18 W 3rd Break Ch-S 78% 24 W 3rd Break Fn-N 50% 24 W 4th Break Cr 42% 18 W 4th Break Fn little 28 W 4th Break Ch little 28 W 1 Siz Cr 66-68% 36 W 1 Siz Fn 72-74% 36 W 2 Siz Cr 88-90% 36W ______________________________________
TABLE III ______________________________________ Average Conventional Ash Ex 1 Roller Content Yield Mill Yield (wt %) (wt %) (wt %) ______________________________________ Patent Stream .ltoreq..75 66.6 59.6 Total Food Grade .ltoreq.1.0 76.0 71.8 Stream Ratio Patent Stream/ .88 .83 Total Food Grade Stream ______________________________________
TABLE IV ______________________________________ Measured Aleurone Fluor- escence Number Ash Area of Std. Content (Mean Samples Std. Er- % In- (wt %) Area %) in Mean Dev. ror crease ______________________________________ Batch A Patent 0.84 3.89 10 1.02 0.32 40% Flour Straight 0.99 4.21 10 0.70 0.22 29% Flour Batch B Patent 0.92 2.77 10 0.60 0.19 Flour Straight 1.03 3.27 10 0.59 0.19 Flour ______________________________________